diff --git a/content.h b/content.h
index ff5929d02a..a1ee15b082 100644
--- a/content.h
+++ b/content.h
@@ -52,7 +52,7 @@ bool content_load_state(const char* path, bool load_to_backup_buffer, bool autol
 bool content_save_state(const char *path, bool save_to_disk, bool autosave);
 
 /* Gets the number of bytes required to serialize the state. */
-size_t content_get_serialized_size();
+size_t content_get_serialized_size(void);
 
 /* Serializes the current state. buffer must be at least content_get_serialized_size bytes */
 bool content_serialize_state(void* buffer, size_t buffer_size);
diff --git a/tasks/task_save.c b/tasks/task_save.c
index 07ee1dff54..b9ad6c50fe 100644
--- a/tasks/task_save.c
+++ b/tasks/task_save.c
@@ -620,7 +620,7 @@ static bool content_get_rastate_size(rastate_size_info_t* size)
    return true;
 }
 
-size_t content_get_serialized_size()
+size_t content_get_serialized_size(void)
 {
    rastate_size_info_t size;
    if (!content_get_rastate_size(&size))